Intracellular axonemes within ciliated cells in the tracheal epithelium of domestic pigs

Extended aggregates of intracellular axonemal derivatives can be seen within the apical cytoplasm of ciliated cells of apparently healthy domestic pigs. Such alterations were observed in 15 out of 20 animals. Complete (9 + 2) or incomplete (8 + 2 - 5 + 2) intracellular axonemes were found which some...

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Bibliographic Details
Published in:Journal of anatomy 1992-02, Vol.180 (Pt 1), p.25-30
Main Authors: RADNER, W, STOCKINGER, L
Format: Article
Language:English
Subjects:
Air breathing
Animals
Biological and medical sciences
Cilia - ultrastructure
Cytoplasm - ultrastructure
Epithelium - ultrastructure
Fundamental and applied biological sciences. Psychology
Microscopy, Electron
Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics
Swine - anatomy & histology
Trachea - ultrastructure
Vertebrates: respiratory system
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Summary:Extended aggregates of intracellular axonemal derivatives can be seen within the apical cytoplasm of ciliated cells of apparently healthy domestic pigs. Such alterations were observed in 15 out of 20 animals. Complete (9 + 2) or incomplete (8 + 2 - 5 + 2) intracellular axonemes were found which sometimes arose from mature, irregularly arranged kinetosomes. In addition, bundles of single microtubules and microtubular pairs were found. In previous investigations on the ciliated epithelium of different mammals, intracellular axonemes were investigated only under pathological or experimental conditions. Our findings indicate that these alterations also occur in healthy animals. The extended aggregates of intracellular axonemal derivatives are more likely to be due to a failure of ciliary maturation than to a degradation of incorporated mature cilia.
ISSN:0021-8782
1469-7580